diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 00000000..9f5b96e3
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,116 @@
+import EventEmitter from "events";
+
+export type SupportedLexer = "HandlebarsLexer" | "HTMLLexer" | "JavascriptLexer" | "JsxLexer" | "VueLexer";
+
+// BaseLexer is not importable therefore this is the best if done simple
+export class CustomLexerClass extends EventEmitter {}
+export type CustomLexer = typeof CustomLexerClass;
+
+export interface CustomLexerConfig extends Record<string, unknown> {
+  lexer: CustomLexer;
+}
+
+export interface HandlebarsLexerConfig {
+  lexer: "HandlebarsLexer";
+  functions?: string[];
+}
+
+export interface HTMLLexerConfig {
+  lexer: "HTMLLexer";
+  functions?: string[];
+  attr?: string;
+  optionAttr?: string;
+}
+
+export interface JavascriptLexerConfig {
+  lexer: "JavascriptLexer";
+  functions?: string[];
+  namespaceFunctions?: string[];
+  attr?: string;
+  parseGenerics?: false;
+  typeMap?: Record<string, unknown>;
+}
+
+export interface JavascriptWithTypesLexerConfig {
+  lexer: "JavascriptLexer";
+  functions?: string[];
+  namespaceFunctions?: string[];
+  attr?: string;
+  parseGenerics: true;
+  typeMap: Record<string, unknown>;
+}
+
+export interface JsxLexerConfig {
+  lexer: "JsxLexer";
+  functions?: string[];
+  namespaceFunctions?: string[];
+  attr?: string;
+  transSupportBasicHtmlNodes?: boolean;
+  transKeepBasicHtmlNodesFor?: string[];
+  parseGenerics?: false;
+  typeMap?: Record<string, unknown>;
+}
+
+export interface JsxWithTypesLexerConfig {
+  lexer: "JsxLexer";
+  functions?: string[];
+  namespaceFunctions?: string[];
+  attr?: string;
+  transSupportBasicHtmlNodes?: boolean;
+  transKeepBasicHtmlNodesFor?: string[];
+  parseGenerics: true;
+  typeMap: Record<string, unknown>;
+}
+
+export interface VueLexerConfig {
+  lexer: "VueLexer";
+  functions?: string[];
+}
+
+export type LexerConfig =
+  | HandlebarsLexerConfig
+  | HTMLLexerConfig
+  | JavascriptLexerConfig
+  | JavascriptWithTypesLexerConfig
+  | JsxLexerConfig
+  | JsxWithTypesLexerConfig
+  | VueLexerConfig
+  | CustomLexerConfig;
+
+export interface UserConfig {
+  contextSeparator?: string;
+  createOldCatalogs?: boolean;
+  defaultNamespace?: string;
+  defaultValue?: string | ((locale?: string, namespace?: string, key?: string) => string);
+  indentation?: number;
+  keepRemoved?: boolean;
+  keySeparator?: string | false;
+  lexers?: {
+    hbs?: (SupportedLexer | CustomLexer | LexerConfig)[];
+    handlebars?: (SupportedLexer | CustomLexer | LexerConfig)[];
+    htm?: (SupportedLexer | CustomLexer | LexerConfig)[];
+    html?: (SupportedLexer | CustomLexer | LexerConfig)[];
+    mjs?: (SupportedLexer | CustomLexer | LexerConfig)[];
+    js?: (SupportedLexer | CustomLexer | LexerConfig)[];
+    ts?: (SupportedLexer | CustomLexer | LexerConfig)[];
+    jsx?: (SupportedLexer | CustomLexer | LexerConfig)[];
+    tsx?: (SupportedLexer | CustomLexer | LexerConfig)[];
+    default?: (SupportedLexer | CustomLexer | LexerConfig)[];
+  };
+  lineEnding?: "auto" | "crlf" | "\r\n" | "cr" | "\r" | "lf" | "\n";
+  locales?: string[];
+  namespaceSeparator?: string | false;
+  output?: string;
+  pluralSeparator?: string;
+  input?: string | string[];
+  sort?: boolean | ((a: string, b: string) => -1 | 0 | 1);
+  skipDefaultValues?: boolean | ((locale?: string, namespace?: string) => boolean);
+  useKeysAsDefaultValue?: boolean | ((locale?: string, namespace?: string) => boolean);
+  verbose?: boolean;
+  failOnWarnings?: boolean;
+  failOnUpdate?: boolean;
+  customValueTemplate?: Record<string, string> | null;
+  resetDefaultValueLocale?: string | null;
+  i18nextOptions?: Record<string, unknown> | null;
+  yamlOptions?: Record<string, unknown> | null;
+}